FreeBSD + DirectAdmin additional packages
You always wanted to know how many resources use every user? This is possible by using "sa" utility.
But you need to do it "easy to read". "Load statistic" package do it!
Mail per user
Want offer your users a secure test period, without fear that they will send spam?
Do you want to ban some users from sending email from the server?
Want to protect yourself from DarkMailer / DirectMailer (dm.cgi)? "Mail per user" package - that is exactly what you need.